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45 #include <QtCore/qglobal.h>
52 typedef unsigned int QRgb; // RGB triplet
54 const QRgb RGB_MASK = 0x00ffffff; // masks RGB values
56 inline int qRed(QRgb rgb) // get red part of RGB
57 { return ((rgb >> 16) & 0xff); }
59 inline int qGreen(QRgb rgb) // get green part of RGB
60 { return ((rgb >> 8) & 0xff); }
62 inline int qBlue(QRgb rgb) // get blue part of RGB
63 { return (rgb & 0xff); }
65 inline int qAlpha(QRgb rgb) // get alpha part of RGBA
68 inline QRgb qRgb(int r, int g, int b)// set RGB value
69 { return (0xffu << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
71 inline QRgb qRgba(int r, int g, int b, int a)// set RGBA value
72 { return ((a & 0xff) << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
74 inline int qGray(int r, int g, int b)// convert R,G,B to gray 0..255
75 { return (r*11+g*16+b*5)/32; }
77 inline int qGray(QRgb rgb) // convert RGB to gray 0..255
78 { return qGray(qRed(rgb), qGreen(rgb), qBlue(rgb)); }
80 inline bool qIsGray(QRgb rgb)
81 { return qRed(rgb) == qGreen(rgb) && qRed(rgb) == qBlue(rgb); }